Texas Instruments
Texas Instruments: At a Snail's Pace for the Ti 73 Explorer
It is hard to imagine a way to mathematically describe a spiral. Spirals are commonly seen in nature. There are a number of different types of spirals. Some interesting examples include the spiral arrangements of scales in pine cones,...
Environmental Education for Kids
Eek!: Evergreens
Site chronicles Wisconsin's Evergreen and Conifer trees. There are descriptions of the various tree types. Additionally, site details the uses of these trees in nature. Ideal for grades 4-8.
Smithsonian Institution
National Museum of Natural History: American Mammals: Douglas' Squirrel
Douglas's Squirrels are small, energetic, and very active during the day all year long. They spend many hours collecting and storing green pine cones to eat during the harsh winters. Learn more about the Tamiasciurus douglasii, more...
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